Old-school wisdom says you shouldn’t mix your metals, but silver, gold, brass, bronze, and copper can happily cohabitate in any room. Nothing warms up a gray wall like an antique gold frame, so why not add vintage silver-plate sconces alongside a gilded mirror? Or hang a vintage brass chandelier or a contemporary Tom Dixon copper pendant light in your modern kitchen full of brushed nickel hardware? You’ll get the most impact if you mix cool metals like silver with warm metals like gold or brass.